The minimum frequency of light needed to eject electrons from a metal is called the threshold frequency,? 0 ν0. Find the minimum energy needed to eject electrons from a metal with a threshold frequency of 4.23 * 10 14 s1. 4.23*1014 s-1.

E = 2.8028*10⁻¹⁹ Joules

Explanation:

The minimum energy needed to eject electrons from a metal with a threshold frequency fo is expressed as E = hfo

h = planck's constant

fo = threshold frequency

Given the threshold frequency fo = 4.23*10¹⁴ s⁻¹

h = 6.626 * 10⁻³⁴ m² kg / s

Substituting this value into the formula to get the energy E

E = 4.23*10¹⁴ * 6.626 * 10⁻³⁴

E = 28.028*10¹⁴⁻³⁴

E = 28.028*10⁻²⁰

E = 2.8028*10⁻¹⁹ Joules